A note on the effect of plane of nutrition on fractional outflow rates from the rumen and urinary allantoin excretion by wether sheep

RJ Dewhurst, AJF Webster

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

During a series of routine experiments to evaluate 16 foods offered to wether sheep, conventional measurements of digestibility were augmented by measurement of fractional outflow rates (FOR) of solids (ks) and liquid (k1) from the rumen and urinary allantoin nitrogen excretion (UAN) as an index of microbial yield. Fixed (1 kg) amounts of ‘dry’ foods were offered to sheep ranging in weight from 42 to 89 kg which permitted a retrospective analysis of plane of nutrition effects on diet digestibility, ks, k1 and UAN. Each diet was simultaneously offered to three sheep (one each of large, medium and small size). Smaller sheep had significantly higher FOR, significantly lower apparent digestibilities of dry matter and significantly higher UAN (g/kg digestible organic matter (DOM)). Higher UAN (g/kg DOM) indicated higher microbial energetic efficiencies with the smaller sheep.
Original languageEnglish
Pages (from-to)445-448
JournalAnimal Science
Volume54
Issue number3
Publication statusPrint publication - Jun 1992

Fingerprint

allantoin
feeding level
rumen
excretion
sheep
digestibility
nitrogen
organic matter
energy efficiency
diet
liquids

Keywords

  • Allantoin
  • Digestibility
  • Plane of nutrition
  • Sheep

Cite this

@article{6936ff2db08246009dd94c4099b76a76,
title = "A note on the effect of plane of nutrition on fractional outflow rates from the rumen and urinary allantoin excretion by wether sheep",
abstract = "During a series of routine experiments to evaluate 16 foods offered to wether sheep, conventional measurements of digestibility were augmented by measurement of fractional outflow rates (FOR) of solids (ks) and liquid (k1) from the rumen and urinary allantoin nitrogen excretion (UAN) as an index of microbial yield. Fixed (1 kg) amounts of ‘dry’ foods were offered to sheep ranging in weight from 42 to 89 kg which permitted a retrospective analysis of plane of nutrition effects on diet digestibility, ks, k1 and UAN. Each diet was simultaneously offered to three sheep (one each of large, medium and small size). Smaller sheep had significantly higher FOR, significantly lower apparent digestibilities of dry matter and significantly higher UAN (g/kg digestible organic matter (DOM)). Higher UAN (g/kg DOM) indicated higher microbial energetic efficiencies with the smaller sheep.",
keywords = "Allantoin, Digestibility, Plane of nutrition, Sheep",
author = "RJ Dewhurst and AJF Webster",
year = "1992",
month = "6",
language = "English",
volume = "54",
pages = "445--448",
journal = "Animal Science",
number = "3",

}

A note on the effect of plane of nutrition on fractional outflow rates from the rumen and urinary allantoin excretion by wether sheep. / Dewhurst, RJ; Webster, AJF.

In: Animal Science, Vol. 54, No. 3, 06.1992, p. 445-448.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A note on the effect of plane of nutrition on fractional outflow rates from the rumen and urinary allantoin excretion by wether sheep

AU - Dewhurst, RJ

AU - Webster, AJF

PY - 1992/6

Y1 - 1992/6

N2 - During a series of routine experiments to evaluate 16 foods offered to wether sheep, conventional measurements of digestibility were augmented by measurement of fractional outflow rates (FOR) of solids (ks) and liquid (k1) from the rumen and urinary allantoin nitrogen excretion (UAN) as an index of microbial yield. Fixed (1 kg) amounts of ‘dry’ foods were offered to sheep ranging in weight from 42 to 89 kg which permitted a retrospective analysis of plane of nutrition effects on diet digestibility, ks, k1 and UAN. Each diet was simultaneously offered to three sheep (one each of large, medium and small size). Smaller sheep had significantly higher FOR, significantly lower apparent digestibilities of dry matter and significantly higher UAN (g/kg digestible organic matter (DOM)). Higher UAN (g/kg DOM) indicated higher microbial energetic efficiencies with the smaller sheep.

AB - During a series of routine experiments to evaluate 16 foods offered to wether sheep, conventional measurements of digestibility were augmented by measurement of fractional outflow rates (FOR) of solids (ks) and liquid (k1) from the rumen and urinary allantoin nitrogen excretion (UAN) as an index of microbial yield. Fixed (1 kg) amounts of ‘dry’ foods were offered to sheep ranging in weight from 42 to 89 kg which permitted a retrospective analysis of plane of nutrition effects on diet digestibility, ks, k1 and UAN. Each diet was simultaneously offered to three sheep (one each of large, medium and small size). Smaller sheep had significantly higher FOR, significantly lower apparent digestibilities of dry matter and significantly higher UAN (g/kg digestible organic matter (DOM)). Higher UAN (g/kg DOM) indicated higher microbial energetic efficiencies with the smaller sheep.

KW - Allantoin

KW - Digestibility

KW - Plane of nutrition

KW - Sheep

UR - https://doi.org/10.1017/S0003356100020912

M3 - Article

VL - 54

SP - 445

EP - 448

JO - Animal Science

JF - Animal Science

IS - 3

ER -